英语：状语从句复习课件2.pptVIP

状语从句 定义： 在复合句中由从句表示的状语称作状语从句，来说明一件事情发生的时间,地点,原因,条件,结果等. 它可以用来修饰谓语（包括非谓语动词）、定语或状语，或是整个句子。 1、时间状语从句 2、地点状语从句 3、原因状语从句 4、目的状语从句 5、结果状语从句 6、条件状语从句 7、方式状语从句 8、让步状语从句 9、比较状语从句 一 时间状语从句 连接词while, when, as, whenever, before, after, since, till, until, once, as soon as, no sooner…than, hardly/scarcely/barely… when, the moment, the second, the instant, every time, each time, next time, the first/last time, by the time directly, immediately, instantly等 １. when / whenever When I came into the room, he was writing a letter.当我进屋时，他正在写信。 We shall go there whenever we are free.我们什么时间有空，我们就去那里。 2. when / while/ as When 既可指某一点时间,也可指一段时间; When he returned, his wife was cooking. while指“在某一段时间里”，“在…期间”，引导的动作必须是持续性的; While he was reading, his wife was cooking. as强调主句和从句的动作同时发生。,翻译成”一边……一边……” As he was reading, he was listening to the radio. 注意: when / while都可以做并列连词,连接并列句,when表示 “就在这时”和 “was doing”, “had just done”和 “was about to do”连用;while则表示转折“然而” I was walking in the street when suddenly someone patted me on the shoulder from behind. My father was cooking while my mother was playing cards. 3. “一……就……” As soon as I arrive in Shanghai, I’ll write to you. upon/ on+ arriving Immediately +句子 The +时间名词(minute/moment ……)+句子 hardly…when no sooner…than 4. 连接词before\since的小结： 一、含义 1． We had sailed four days and four nights before we saw land. 2． We hadn’t run a mile before he felt tired. 3． Please write it down before you forget it. 4．Before I could get in a word, he had measured me. “……才” “不到……就” “趁……” “还没来得及” 二．Before从句中谓语不用否定式。如： Before they reached the station, the train had gone. 三．1）句型It will be/was＋段时间＋before…“过多久才……” 如：It will be two years before he leaves the country. 2）句型It will be/was not＋一段时间＋before…“没多久就……” 如： It wasn’t two years before he left the country. 3）句型It is＋段时间＋since…时间的计算一律从since从句的 动作完成或状态结束时算起。如： It is three years since she was in the army. It is three years since she joined the